Destroyer – or About How to Philosophize with the Hammer is the fourth full-length album by Norwegianblack metal band Gorgoroth. It was their first release on Nuclear Blast. It contained eight tracks performed by several different lineups, with band founder Infernus being the only member to be featured on all tracks. Four different vocalists were featured on the album, including Infernus on two tracks, Pest on four tracks, and T-Reaper and new vocalist Gaahl each on one track.
Destroyer was the first album to feature Gaahl and guitarist Tormentor, the only one for T-Reaper and drummer Vrolok, the last to feature Pest until his return in 2008, and the last for drummer Frost until his return in 2004.
The album was re-released in 2006 by Back on Black Records as a gatefold vinyl LP. The subtitle of the album, "Or About How to Philosophize with the Hammer", was also the subtitle of Nietzsche's Twilight of the Idols, which itself would be a future Gorgoroth album title.